fix(db): use int for netspeed_active to prevent overflow

GetZoneStatsData and GetZoneStatsV2's netspeed_active values can
exceed 2 billion, causing 32-bit integer overflow. Changed from
int32/uint32 to int (64-bit on modern systems) to handle large
network speed totals.

- Update sqlc column overrides to use int type
- Fix type compatibility in dnsanswers.go zoneTotals map
- Regenerate database code with new types

Fixes https://community.ntppool.org/t/error-message-displayed-on-the-monitoring-score-page/4063

sqlc.yaml

@@ -18,4 +18,8 @@ sql:
           - column: log_scores.attributes
             go_type: go.ntppool.org/common/types.LogScoreAttributes
           - column: "server_netspeed.netspeed_active"
-            go_type: "uint64"
+            go_type: "int"
+          - column: "zone_server_counts.netspeed_active"
+            go_type: "int"
+          - db_type: "bigint"
+            go_type: "int"